## units and dimensions-MCQ-Basic

Dear Readers,

Physics is an important subject in preparation for various Competitive exams.To keep a track of your preparation we have designed a small quiz of 10 Basic Level Questions on units and dimensions. You have 10 minutes to solve the quiz, click the start timer button in order to start the timer and then click on submit button at the end to submit the quiz and view your scores and correct answers.

Q1. Number of base SI units is

•  4
•  7
•  3
•  5

7

Q2. The unit of Planck's constant is

•  Joule
•  Joule/s
•  Joule/m
•  Joule- s

Joule- s

Q3. The unit of reactance is

•  Ohm
•  Volt
•   Mho
•  Newton

Ohm

Q4. Which of the following quantities is dimensionless

•  Gravitational constant
•  Planck's constant
•  Power of a convex lens
•  None of these

None of these

Q5. Which of the two have same dimensions

•  Force and strain
•  Force and stress
•  Angular velocity and frequency
•  Energy and strain

Angular velocity and frequency

Q6. The dimensions of pressure is equal to

•  Force per unit volume
•  Energy per unit volume
•  Force
•  Energy

Energy per unit volume

Q7. Identify the pair whose dimensions are equal

•  Torque and work
•  Stress and energy
•  Force and stress
•  Force and work

Torque and work

Q8. Two quantities A and B have different dimensions. Which mathematical operation given below is physically meaningful

•  A/B
•  A + B
•  A – B
•  None of the above

A/B

Q9. Light year is a unit of

•  Time
•  mass
•  Distance
•  Energy

mass

Q10. Choose the wrong statement(s)

•  A dimensionally correct equation may be correct
•  A dimensionally correct equation may be incorrect
•  A dimensionally incorrect equation may be incorrect
•  A dimensionally incorrect equation may be incorrect

A dimensionally incorrect equation may be incorrect

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